C# 获取 mp3文件信息【包括：文件大小、歌曲长度、歌手、专辑】
第一种方式：[代码已验证]
// http://bbs.csdn.net/topics/390392612
string file = @"E:滴答.mp3"; ShellClass sh = new ShellClass(); Folder dir = sh.NameSpace(Path.GetDirectoryName(file)); FolderItem item = dir.ParseName(Path.GetFileName(file)); string str = dir.GetDetailsOf(item, 27) ; // 获取歌曲时长。 MessageBox.Show(str);// 如果执行过程中，出现是错误提示，通过Shell32 的 Embed Interop Types 属性设置为 False 即可；
//如果是1.0版本会报错请下载1.2版本 下载地址
https://download.csdn.net/download/u013087481/10952812
调用结果，在Win2003,2008,xp上应使用dir.GetDetailsOf(item, 21) ，而在Vista,win7、win8,win10等系统应使用folder.GetDetailsOf(folderItem, 27) ，主要是因为不同系统下文件属性索引顺序不同造成。只要右键单击文件属性，能看到的媒体属性都能取到，可以换不同的索引值来取。如下所示，取出的时间长度是 00:03:52，目标完成。
shell 获取 文件详细信息
首先引用COM组件 Microsoft Shell Controls And Automation 这里需要注意 DLL的属性Embed Interop Type 设为False 否则会引起互操作类型异常 代码如下 ShellClass sh = new ShellClass(); Folder dir = sh.NameSpace(Path.GetDirectoryName(sFile)); FolderItem item = dir.ParseName(Path.GetFileName(sFile)); string det = dir.GetDetailsOf(item, iCol); iCol 对应文件详细属性汇总 ID => DETAIL-NAME 0 => Name 1 => Size // MP3 文件大小 2 => Type 3 => Date modified 4 => Date created 5 => Date accessed 6 => Attributes 7 => Offline status 8 => Offline availability 9 => Perceived type 10 => Owner 11 => Kinds 12 => Date taken 13 => Artists // MP3 歌手 14 => Album // MP3 专辑 15 => Year 16 => Genre 17 => Conductors 18 => Tags 19 => Rating 20 => Authors 21 => Title // MP3 歌曲名 22 => Subject 23 => Categories 24 => Comments 25 => Copyright 26 => # 27 => Length // MP3 时长 28 => Bit rate 29 => Protected 30 => Camera model 31 => Dimensions 32 => Camera maker 33 => Company 34 => File description 35 => Program name 36 => Duration 37 => Is online 38 => Is recurring 39 => Location 40 => Optional attendee addresses 41 => Optional attendees 42 => Organizer address 43 => Organizer name 44 => Reminder time 45 => Required attendee addresses 46 => Required attendees 47 => Resources 48 => Free/busy status 49 => Total size 50 => Account name 51 => Computer 52 => Anniversary 53 => Assistant's name 54 => Assistant's phone 55 => Birthday 56 => Business address 57 => Business city 58 => Business country/region 59 => Business P.O. box 60 => Business postal code 61 => Business state or province 62 => Business street 63 => Business fax 64 => Business home page 65 => Business phone 66 => Callback number 67 => Car phone 68 => Children 69 => Company main phone 70 => Department 71 => E-mail Address 72 => E-mail2 73 => E-mail3 74 => E-mail list 75 => E-mail display name 76 => File as 77 => First name 78 => Full name 79 => Gender 80 => Given name 81 => Hobbies 82 => Home address 83 => Home city 84 => Home country/region 85 => Home P.O. box 86 => Home postal code
//第二种方式： 读取文件结构获取 MP3文件信息 [代码未验证]
public struct Mp3Info
{
public string identify;//TAG，三个字节
public string Title;//歌曲名,30个字节
public string Artist;//歌手名,30个字节
public string Album;//所属唱片,30个字节
public string Year;//年,4个字符
public string Comment;//注释,28个字节
public char reserved1;//保留位，一个字节
public char reserved2;//保留位，一个字节
public char reserved3;//保留位，一个字节
}
/// <summary>
/// mp3类
/// </summary>
public class clsMP3
{
public void fLogSave(Page _sender, Hashtable _htUser)
{
}
//所以，我们只要把MP3文件的最后128个字节分段读出来并保存到该结构里就可以了。函数定义如下：
private byte[] getLast128(string FileName)
{
FileStream fs = new FileStream(FileName, FileMode.Open, FileAccess.Read);
Stream stream = fs;
stream.Seek(-128, SeekOrigin.End);
const int seekPos = 128;
int rl = 0;
byte[] Info = new byte[seekPos];
rl = stream.Read(Info, 0, seekPos);
fs.Close();
stream.Close();
return Info;
}
//再对上面返回的字节数组分段取出，并保存到Mp3Info结构中返回:
private Mp3Info getMp3Info(byte[] Info)
{
Mp3Info mp3Info = new Mp3Info();
string str = null;
int i;
int position = 0;//循环的起始值
int currentIndex = 0;//Info的当前索引值
//获取TAG标识(数组前3个)
for (i = currentIndex; i < currentIndex + 3; i++)
{
str = str + (char)Info[i];
position++;
}
currentIndex = position;
mp3Info.identify = str;
//获取歌名（数组3-32）
str = null;
byte[] bytTitle = new byte[30];//将歌名部分读到一个单独的数组中
int j = 0;
for (i = currentIndex; i < currentIndex + 30; i++)
{
bytTitle[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Title = this.byteToString(bytTitle);
//获取歌手名（数组33-62）
str = null;
j = 0;
byte[] bytArtist = new byte[30];//将歌手名部分读到一个单独的数组中
for (i = currentIndex; i < currentIndex + 30; i++)
{
bytArtist[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Artist = this.byteToString(bytArtist);
//获取唱片名（数组63-92）
str = null;
j = 0;
byte[] bytAlbum = new byte[30];//将唱片名部分读到一个单独的数组中
for (i = currentIndex; i < currentIndex + 30; i++)
{
bytAlbum[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Album = this.byteToString(bytAlbum);
//获取年 （数组93-96）
str = null;
j = 0;
byte[] bytYear = new byte[4];//将年部分读到一个单独的数组中
for (i = currentIndex; i < currentIndex + 4; i++)
{
bytYear[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Year = this.byteToString(bytYear);
//获取注释（数组97-124）
str = null;
j = 0;
byte[] bytComment = new byte[28];//将注释部分读到一个单独的数组中
for (i = currentIndex; i < currentIndex + 25; i++)
{
bytComment[j] = Info[i];
position++;
j++;
}
currentIndex = position;
mp3Info.Comment = this.byteToString(bytComment);
//以下获取保留位（数组125-127）
mp3Info.reserved1 = (char)Info[++position];
mp3Info.reserved2 = (char)Info[++position];
mp3Info.reserved3 = (char)Info[++position];
return mp3Info;
}
//上面程序用到下面的方法：
/// <summary>
/// 将字节数组转换成字符串
/// </summary>
/// <param name = "b">字节数组</param>
/// <returns>返回转换后的字符串</returns>
private string byteToString(byte[] b)
{
Encoding enc = Encoding.GetEncoding("GB2312");
string str = enc.GetString(b);
str = str.Substring(0, str.IndexOf(' ') >= 0 ? str.IndexOf(' ') : str.Length);//去掉无用字符
return str;
}
}